100 % CPU usage
I wondered if this happened to others.
When I notice it I start a terminal, go to 'su' , run 'top'. Then kill -9 xxxx.
problem gone. (the -9 says really do it)
'top' will tell you all sorts on interesting things.
Yes, it does. See also https://forum.vivaldi.net/topic/57973/constant-high-cpu, https://forum.vivaldi.net/topic/62578/vivaldi-bin-goes-to-100-cpu-after-maintenance/, https://forum.vivaldi.net/topic/59122/vivaldi-uses-100-of-one-of-cpu-cores-on-each-update-via-software-updater, https://forum.vivaldi.net/topic/53293/introducing-vivaldi-mail-in-technical-preview/333, https://forum.vivaldi.net/topic/57147/it-s-about-time-vivaldi-browser-snapshot-2202-3/77, ...
I think best is to press
Shift+Escand then sort by CPU Usage within Vivaldi to see what is actually causing this. For me, it was typically Mail / Calendar.
Thanks for the tips. I have never experienced issues like yours.